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-   -   rear end pinging noies (http://986forum.com/forums/boxster-general-discussions/25336-rear-end-pinging-noies.html)

pyiap 07-03-2010 10:30 PM

rear end pinging noies
I've always wondered about this, but is it normal for pinging noise to come from the rear end of my car after I stop it. It sounds like tin cans being hit with small pebbles. I always thought it was metal expanding and shrinking. It stops after a while I'm assuming it's because the engine has cooled down. Does everyone else get this or is it just me?

Steve Tinker 07-03-2010 10:54 PM

My (standard) exhaust system certainly pings and cracks - especially during warm up as the stainless steel expands. I put it down to the relativly short length of the headers and cats to the exhaust tip - most cars have 2-3 meters of exhaust pipe length to absorb the expansion, but the boxer engine has probably less then a meter. It gets hotter faster and cooler quicker....

Spinnaker 07-04-2010 01:08 AM

I don't know if it is normal or not, but my 2000S certainly does the same thing.

blue2000s 07-04-2010 06:36 AM

Yes, it's normal. All cars do it to some degree as different parts cool at different rates and move around relative to each-other.

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